Gitea's POST /repos/{repo}/issues expects `labels` as an array of numeric
label IDs, not name strings — every issue creation was failing with a 422
("cannot unmarshal JSON string into Go int64"). Now fetches the repo's
label list and resolves "bug"/"enhancement"/"question" to IDs by name
first; a repo with no matching labels (or a failed lookup) just creates
the issue unlabeled instead of failing the whole request.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Arnaud
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